<template>
  <div id="app">
    <div>
      <p>请选择你要购买的书籍</p>
      <ul><li v-for="(item,index) in arr" :key="index">{{item.name}} <button @click="item.count++">买书</button></li></ul>
      <table border="1" width="500" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>书名</th>
          <th>单价</th>
          <th>数量</th>
          <th>合计</th>
        </tr>
      <tr v-for="(item,index) in arr" :key="index"><td>{{index+1}}</td>
      <td>{{item.name}}</td>
      <td>{{item.price}}</td>
      <td>{{item.count}}</td>
      <td>{{item.price*item.count}}</td>
      </tr>
      </table>
      <p>总价格为:</p>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [
        {
          name: '水浒传',
          price: 107,
          count: 0,
        },
        {
          name: '西游记',
          price: 192,
          count: 0,
        },
        {
          name: '三国演义',
          price: 219,
          count: 0,
        },
        {
          name: '红楼梦',
          price: 178,
          count: 0,
        },
      ],
    }
  },
}
</script>

<style scoped lang="less"></style>
